Collar portion of drinking cup cap



FIG. 1 is a perspective view of a collar portion of drinking cup cap;

FIG. 2 is a top plan view thereof; and,

FIG. 3 is a bottom view thereof.

The broken lines in the drawings depict unclaimed portions of the collar portion of drinking cup cap and forms no part of the claimed design. 

CLAIM An ornamental design for a collar portion of drinking cup cap, as shown and described. 